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Effects of 60Co-γ Ray Radicidation on Instant Tea

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Hunan Agricultural Science ＆ Technology Newsletter 2001年第1期2卷 21-23页

作者： Wang Qian,Peng Ling,Li Wenge,and Deng Gangqiao Hunan Institute of atomic energy Application in Agriculture,Changsha,Hunan 410125 Hunan Insstitute of atomic energy Application in Agriculture

Effects of 60Co-γ ray radicidation on instant tea were studied through contaminant microbe assay,absorbed dose measurement and analysis of principal components of instant *** minimum effective dose of 4.0kGy and maxi... 详细信息

关键词： instant tea radicidation D10 value

HOT DIPPING ALUMINIZED COATING AS HYDROGEN PERMEATION BARRIER

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Acta Metallurgica sinica(English Letters) 2001年第6期14卷 435-440页

作者： Z. Y Yao, M. Chini, A. Aiello and G. Benamati (China Institute of atomic energy, P.O.Box 275-51, Beijing 1024l3, China) ( Department of Physics, University of Trento, 38100 Trento, Italy) ( ENEA CR Brasimone, 40032 Camugnano, Bologna, Italy) China Inst. of atomic energy P.O. Box 275-51 Beijing 102413 China

The hydrogen permeation experiment of MANET II with hot dipping aluminized coating was performed in temperature range of 573 to 623 K, in gas phase and in liquid Pb-17Li phase. The hydrogen permeation reduction factor (PRF) evaluated in gas phase is 620 at 573 K and 260 at 623 K, and in liquid Pb-17Li phase is 24-45 at 573 K and 12-30 at 623 K. The self-healing of coating is obvious and effective above 673 K. The pressure dependence of permeation flux indicates strong surface contribution. The way of filling hydrogen by continuous flow and/or bubble can increase permeation flux. The result of SEM-EDS shows that the microcrack is on the surface of the wetted part, but not on the not wetted part. The crack is superficial and affects only thin outside layer not penetrate aluminized layer. The surface elemental analysis shows that Al/O atomic ratio changes from 2/3 of not wetted part to about 1 of wetted part. The damage of coating surface seems to be related to the interaction of outside layer with liquid Pb-17Li and thermal stress during heating sample.

关键词： Electroless plating Hydrogen Maraging steel Mechanical permeability

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分析不确定性传播的离散矩法(DnMp法)

核科学与工程 1989年第3期9卷 226-236页

作者：罗丹会许汉铭中国原子能科学研究院

本文综合了系统不确定性传播分析中常用的矩法和离散概率分布法,形成了一种更为普遍的新方法:离散矩法,简称DnMp法。该方法能处理可以表示为函数关系式的任何系统,系统中的基本事件假定为互相独立,它们的不确定性可以是离散型分布,也可... 详细信息

本文综合了系统不确定性传播分析中常用的矩法和离散概率分布法,形成了一种更为普遍的新方法:离散矩法,简称DnMp法。该方法能处理可以表示为函数关系式的任何系统,系统中的基本事件假定为互相独立,它们的不确定性可以是离散型分布,也可以是某种连续型分布。新方法能够给出各离散点上该分布的1至p次局部矩及相应的概率,克服了矩法和离散概率分布法各自存在的不足,并能以较少的计算量求得各阶总体矩。本文采用独立模块算法有效地解决了信息爆炸问题。

关键词：核电站概率风险离散矩法传播

DETERMINATION OF TRACE AMOUNTS OF SELENIUM IN ENVIRONMENTAL SAMPLES BY HYDRIDE GENERATION——atomic ABSORPTION SPECTROMETRY COMBINED WITH FLOW INJECTION analysis TECHNIQUE

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Chinese Science Bulletin 1986年第11期31卷 791-792页

作者：王秀方肇伦 Institute of Forestry and Soil Science Academia Sinica Shenyang Institute of Forestry and Soil Science

Selenium is an element having an important effect on animal, plant and human body in environment. Large numbers of samples containing selenium have often to be analysed in environmental laboratories. Therefore, it is ... 详细信息

关键词： hydride urgent analysed selenium laboratories freedom body manual dispersed valve

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场电离检测的Cs原子共振滤波

中国激光 1994年第4期21卷 257-260页

作者：汪盛烈孙献平曾锡之刘炳模丁广良王嘉珉中国科学院武汉物理研究所波谱与原子分子物理开放实验室

报道一种场电离检测的Ｃｓ原子共振滤波方案。理论预计：原子系统的固有线宽约为６０ＭＨｚ，响应时间为１ｎｓ，量子效率为９９％；初步实验测得（包括实验系统因素）响应时间为１２０ｎｓ，最小可探测光强为１０ｎＪ。

关键词：场电离原子共振滤波检测铯

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原子钟相位与频率估计的误差特性

计量学报 1995年第3期16卷 230-234页

作者：卫国中国科学院陕西天文台

本文讨论了原子钟内部的３种噪声即白色调相噪声、白色调频噪声和随机游走调频噪声对相位和频率估计的影响。分析表明，这３种噪声对相位估计和频率估计的影响完全不同。在相位估计中，选择适当的平滑长度和取样间隔可以控制估计误差；... 详细信息

本文讨论了原子钟内部的３种噪声即白色调相噪声、白色调频噪声和随机游走调频噪声对相位和频率估计的影响。分析表明，这３种噪声对相位估计和频率估计的影响完全不同。在相位估计中，选择适当的平滑长度和取样间隔可以控制估计误差；而在频率估计中，估计精度不能通过估计器或测量设备的改进而任意提高，存在一个极限，这个极限由原子钟的内部噪声来决定。

关键词：原子钟噪声相位估计频率估计误差

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高效液体放射色谱法分析P32-ATP

核化学与放射化学 1982年第2期 122-126页

作者：张林祥王美中原子能研究所

核酸生物化学的研究是一个很重要的领域,放射性标记化合物在这一领域中的应用,使这个课题获得了许多有价值的成果,而高效液相色谱分析方法作为研究核苷和核苷酸的分析手段,比其它方法有着显著的优点。早期几乎都采用薄壳型的离子交换液... 详细信息

核酸生物化学的研究是一个很重要的领域,放射性标记化合物在这一领域中的应用,使这个课题获得了许多有价值的成果,而高效液相色谱分析方法作为研究核苷和核苷酸的分析手段,比其它方法有着显著的优点。早期几乎都采用薄壳型的离子交换液体色谱法,近年来有了新的发展,如采用细颗粒的柱填料,使分离效率有了很大提高;在分析方法上也发

关键词： ATP 保留时间放射性检测器色谱柱

Integrated On-line Instrumentation System of Magnetic Properties Measurement

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Journal of Materials Science & Technology 2000年第2期16卷 248-249页

作者： D.G.Park, Y.Y.Song. H.Song and J.H.Hong (Korea atomic energy Research Institute, Yusong P.O.Box 105, Taejon, 305-600 Korea) C.G.Kim (Department of Physics, Sun Moon Univ., Asan-si, Chungnam, 336840 Korea) Korea atomic energy Research Institute Yusong P.O.Box 105 Taejon 305-600 South Korea Department of Physics Sun Moon Univ. Asan-si Chungnam 336-840 South Korea

A portable microcomputer-controlled inspection system has been developed for detection of magnetic properties of soft magnetic materials. It incorporates custom designed software for control of the magnetic field during operation such as demagnetization, field sweeping, and for data logging and analysis. Results are recorded using a 12-bit analog to digital converter and are then stored on disk. The magnetic hysteresis loop and Barkhausen noise data can be converted into important magnetic parameters: coecivity, remanence, and hysteresis loss, Barkhausen amplitude, and Barkhausen noise energy. This system incorporated with the magnetostriction, and magnetoacoustic emission, is then related with the nondestructive detection of material degradation.

关键词： line Integrated On-line Instrumentation System of Magnetic Properties Measurement

Preparation of Chelating Cellulose Filters and Their Application to the Separation and Enrichment of Trace Elements

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Chemical Research in Chinese Universities 1995年第4期11卷 299-305页

作者： LIU Chun-ming(Department of Changchun Normal College, Changchun,130032)GUO Yi-hang and ZHAO Xiao-liang(Center for analysis and Testing, Northeast Normal University, Changchun, 130024) DING Lan(Center for analysis and Testing ,Jilin University, Changchun, CHANGCHUN NORMAL COLL DEPT CHEM CHANGCHUN 130032 PEOPLES R CHINA NE NORMAL UNIV CTR ANAL & TESTING CHANGCHUN 130024 PEOPLES R CHINA JILIN UNIV CTR ANAL & TESTING CHANGCHUN 130023 PEOPLES R CHINA

hreekinds of chelating cellulose filters were prepared and ten trace elements were preconcentrated simultaneously on the microcolumn that was filled with the chelating cellulose filters. Alkali and alkaline earth metal ions were quantitatively separated as matrix elements at the selected pH values. The microcolumn has high enrichment factors and recoveries.

关键词： Chelating cellulose Microcolumn Inductively coupled plasma atomic emission spectrometry Separation and enrichment